Devloping High Energy Radiography for HED Experiments on NIF and Omega-EP

Maddox, B ; Tommasini, R ; Remington, B ; Key, M ; Town, R

Lawrence Livermore National Laboratory

关键词: Photons;    Irradiation;    Electrons;    Targets;    Phosphors;   

DOI  :  10.2172/926064
RP-ID  :  LLNL-TR-401597
RP-ID  :  W-7405-ENG-48
RP-ID  :  926064

美国|英语

来源: UNT Digital Library

【 摘 要 】

High energy radiography capabilities are essential for many future DNT/HED experiments on NIF. We have been developing bright, high-energy (15-100 keV), high resolution (< 20 {micro}m), 1-D and 2-D radiography solutions for DNT experiments on NIF. In this LDRD, we have made significant progress utilizing high-energy, high-intensity, short-pulse lasers to generate hard K-{alpha} photons. High energy K-{alpha} sources are created by hot electrons interacting in the target fluor material after irradiation by lasers with intensity I{sub L} > 10{sup 17} W/cm{sup 2}. High resolution point projection 1-D and 2-D radiography have been achieved using {mu}-foil and {mu}-wire targets attached to low-Z substrate materials. The {mu}-wire size was 10 x 10 x 300 {micro}m on a 300 x 300 x 5 {micro}m CH substrate creating the point source size equivalent to these micro targets. This unique technique will utilize the NIF short pulse laser (ARC) as a backlighter suitable for the full range of DNT science experiments on NIF.